Carburetor muffler



NOV, 24', G. CK

CARBURETOR MUFFLER Filed Aug. 24, 1929 0 O O O O O O O INVEN TOR.

' ATTORNE Patented Nov. 24, .1936

UNITED STATES CARBURETOR MUFFLER Guy M. Hartsock, South Bend, Ind., assignor, by

mesne assignments, to C. F. Burgess Laboratories, Inc., Chicago, 111., a corporation of Delaware Application August 24, 1929, Serial No. 388,113

2 Claims.

This invention relates to muillers for carburetors and has for its object to provide mufiling means therefor including an acoustic material to eliminate the various noises heretofore present in carburetors.

A further object is to provide a muffler havin an outer shell enclosing a relatively thick layer of acoustic material supported by a screen secured to the shell.

A still further object is to provide a flange adapted to be connected with the air intake of a carburetor, a casing or shell secured to projections on the flange to permit free passage of air around the periphery of the flange into the carburetor, and a lining in the shell composed of acoustic material to break up the air currents as the air passed into the carburetor to thus elimiunto the objectionable noises commonly present.

These being among the' objects of the present invention, the same consists of certain-features of construction and combination of parts to be hereinafter described with reference to the accompanying drawing, and then claimed, having the above and other obj ects' in view.

In the accompanying drawing which illustrates a suitable embodiment of the present invention,

Figure 1 is a fragmentary side elevational view of an engine provided with an intake manifold to which is attached a carburetor having my invention included thereon.

Figure 2 is an enlarged side elevation of the muffler, a part of the same being broken away to more clearly show the invention.

Figure 3 is a bottom plan view of the mufiler.

Figure 4 is a section taken on the line 44 of Figure 3.

For the purpose of illustration, I have shown the muiiier as attached to a down draft carburetor and while my invention finds great utility when used in connection with a carburetor of that design, it is to be understood that it is not limited to use with any particular design of carburetor but that it may be used with great efficiency with many of the designs of carburetors now on the market.

Referring to the accompanying drawing in which like numerals refer to like parts throughout the several views, I have shown an internal combustion engine ill having an intake manifold II attached thereto. The manifold II is provided with a flange l2 to which is attached a carburetor l3 by means of the bolts M. The construction just described may be of conventional design and in itself forms no part of my invention, ex-

cept in so far as the same is used in connection with a mufiier about to be described.

The mufiier comprises a supporting or base member l5 terminating in a flange 5 which is split at I! and has a pair of projecting ears l8 adjacent to the split M. The flange I6 is adapted to be attached to the air intake of the carburetor I 3 and is secured thereon by means of the bolt I9 threaded into the projections l 8 to securely clamp the flange i6 on to the air intake. The member I5 is preferably provided with a rolled edge 20 on which are provided projecting lugs 2|.

A dome-shaped shell or casing 22 has its free edges extending around the member [5 and is attached to the lugs 2! by means of the screws 23 so as to permit free passage of air into the carburetor l3 around the periphery of the member I5. A lining 24 is provided Within the shell 22 and comprises a non-inflammable acoustic material preferably made of steel wool, however, other materials such as coppernr brass wool, asbestos or a fibrous, spongy or porous mass may be substituted. The lining 24 is secured within the shell 22 by means of the supporting member 25 which may be formed of screen, perforated metal or other non-inflammable material formed with openings therein permitting the lining to be effective to deaden the noises caused by the air currents passing into the carburetor.

The shell 22 is spaced from the rolled edge 20 of the member [5 to permit an unobstructed passage of the air currents around the periphery of the edge 20 into the carburetor. As the air passes into the carburetor around the member IS, the air currents will be broken up, the lining 25 acting as a sound absorbing means because of its properties as an acoustic material to deaden the noises now common in carburetors due to the inrushing of air currents when the throttle is opened. I

From the foregoing description it will be apparent that I have provided a means for eliminating the noises now common in carburetors and also have provided means for obstructing particles of dirt and foreign matter from entering the carburetor because of the fact that such foreign particles will impinge against the screen 25 and will be sucked into the carburetor and cause damage to the same.

From the foregoing description it will be apparent that the present invention provides a very satisfactory means for correcting a condition now present in carburetors by providing a muffler for the same and that formal changes may be made in the specific embodiment of the invention described without departing from the spirit and substance oi. the broad invention, the scope 0! which is commensurate with the appended claims.

What I claim is: r

1. A silencer for use with the air inlet conduit 01' an internal combustion engine-carburetor comprising a tube-like element to be attachedto the air intake pipe of the carburetor, the outer end of said tube-like element being provided with a curved outwardly extending flange, spaced lugs formed on the curved part of said flange, a domeshaped member secured to said lugs to provide a space between said flange and said dome-shaped member for the passage 0! air into said intake pipe, and a layer of sound-absorbing material arranged on the interior 01 said dome-shaped member.

2. A silencer for use with the air inlet conduit oi an internal combustion engine carburetor comprising a tube-like element to be attached to the air intake pipe of the carburetor, the outer end of said tube-like element being provided with a curved outwardly extending flange, spaced lugs formed on the curved part of said flange, a domeshaped member secured to said lugs to provide a space between said flange and said dome-shaped member for the passage or air into said intake pipe, a layer of sound-absorbing material arranged on the interior of said dome-shaped member, and a non-flammable pervious covering for said sound-absorbing material.

GUY M. HARTSOCK. 

